
Answer:
$ 410,000
Explanation:
Mark Up = 20% or 1/5
Therefore margin = 1/ 5 -1 = 1/4
Trading Account for the Month Ended March 31
Sales                                  720000
Less Cost of Sales
Opening Inventory            $540000
Add Purchases                420000
Less Purchases Returns         (10000)   Â
Less Closing Inventory          410,000    540,000
Gross Profit                             180,000